Moteurs de stockage
InnoDB
Supports transactions, row-level locking, foreign keys and encryption for tables
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Variables
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Mémoire tampon
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État InnoDB
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2025-09-08 17:23:57 0x30b8 INNODB MONITOR OUTPUT
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Per second averages calculated from the last 55 seconds
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BACKGROUND THREAD
-----------------
srv_master_thread loops: 401853 srv_active, 0 srv_shutdown, 29380 srv_idle
srv_master_thread log flush and writes: 431233
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SEMAPHORES
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OS WAIT ARRAY INFO: reservation count 266586
OS WAIT ARRAY INFO: signal count 211783
RW-shared spins 105663, rounds 2427446, OS waits 78662
RW-excl spins 4334, rounds 106152, OS waits 3161
RW-sx spins 169, rounds 4199, OS waits 122
Spin rounds per wait: 22.97 RW-shared, 24.49 RW-excl, 24.85 RW-sx
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TRANSACTIONS
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Trx id counter 14350325
Purge done for trx's n:o < 14350325 undo n:o < 0 state: running
History list length 4
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 284218235633808, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284218235650480, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284218235646312, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284218235642144, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
---TRANSACTION 284218235637976, not started
0 lock struct(s), heap size 1128, 0 row lock(s)
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FILE I/O
--------
I/O thread 0 state: native aio handle (insert buffer thread)
I/O thread 1 state: native aio handle (log thread)
I/O thread 2 state: native aio handle (read thread)
I/O thread 3 state: native aio handle (read thread)
I/O thread 4 state: native aio handle (read thread)
I/O thread 5 state: native aio handle (read thread)
I/O thread 6 state: native aio handle (write thread)
I/O thread 7 state: native aio handle (write thread)
I/O thread 8 state: native aio handle (write thread)
I/O thread 9 state: native aio handle (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
ibuf aio reads:, log i/o's:, sync i/o's:
Pending flushes (fsync) log: 0; buffer pool: 0
1397693 OS file reads, 6963439 OS file writes, 3797081 OS fsyncs
5.33 reads/s, 16384 avg bytes/read, 15.58 writes/s, 8.71 fsyncs/s
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INSERT BUFFER AND ADAPTIVE HASH INDEX
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Ibuf: size 1, free list len 0, seg size 2, 0 merges
merged operations:
insert 0, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 0 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
Hash table size 4441, node heap has 1 buffer(s)
40.49 hash searches/s, 80.58 non-hash searches/s
---
LOG
---
Log sequence number 9281226060
Log flushed up to 9281226040
Pages flushed up to 9281137176
Last checkpoint at 9281137176
0 pending log flushes, 0 pending chkp writes
2011376 log i/o's done, 4.87 log i/o's/second
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BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 33554432
Dictionary memory allocated 247896
Buffer pool size 1003
Free buffers 739
Database pages 258
Old database pages 0
Modified db pages 81
Percent of dirty pages(LRU & free pages): 8.116
Max dirty pages percent: 75.000
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 18, not young 482
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1397586, created 59232, written 4184711
24.49 reads/s, 0.00 creates/s, 1.00 writes/s
Buffer pool hit rate 935 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 258, unzip_LRU len: 0
I/O sum[728]:cur[2], unzip sum[0]:cur[0]
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ROW OPERATIONS
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0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=4648, Main thread ID=6648, state: sleeping
Number of rows inserted 331, updated 1392237, deleted 18, read 32093018
0.00 inserts/s, 3.51 updates/s, 0.00 deletes/s, 34.22 reads/s
Number of system rows inserted 0, updated 0, deleted 0, read 39581
0.00 inserts/s, 0.00 updates/s, 0.00 deletes/s, 0.00 reads/s
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END OF INNODB MONITOR OUTPUT
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